CHAPTER72 Configuration Parameters Reference
Mediant 800 Gateway & E-SBC | User's Manual
Parameter Description
'RTP Redundancy Depth'
configure voip > media rtp-
rtcp > RTP-redundancy-depth
[RTPRedundancyDepth]
Global parameter that enables the device to generate
RFC 2198 redundant packets. You can also configure
this feature per specific calls, using IP Profiles
(IpProfile_RTPRedundancyDepth). For a detailed
description of the parameter and for configuring this
feature in the IP Profiles table, see Configuring IP
Profiles.
Note: If this feature is configured for a specific IP
Profile, the settings of this global parameter is ignored
for calls associated with the IP Profile.
'Enable RTP Redundancy
Negotiation'
configure voip > sip-
definition settings > rtp-
rdcy-nego-enbl
[EnableRTPRedundancyNegotiation]
Enables the device to include the RTP redundancy
dynamic payload type in the SDP (according to RFC
2198).
■ [0] Disable (default)
■ [1] Enable = The device includes in the SDP
message the RTP payload type "RED" and the
payload type configured by the parameter
RFC2198PayloadType.
a=rtpmap:<PT> RED/8000
Where <PT> is the payload type as defined by
RFC2198PayloadType. The device sends the INVITE
message with "a=rtpmap:<PT> RED/8000" and
responds with a 18x/200 OK and "a=rtpmap:<PT>
RED/8000" in the SDP.
Note:
■ The parameter is applicable only to the Gateway
application.
■ For this feature to be functional, you must also set
the parameter RTPRedundancyDepth to 1 (i.e.,
enabled).
■ Currently, the negotiation of “RED” payload type
is not supported and therefore, it should be
configured to the same PT value for both parties.
'RFC 2198 Payload Type'
configure voip > media rtp-
rtcp > RTP-redundancy-
payload-type
[RFC2198PayloadType]
Defines the RTP redundancy packet payload type
(according to RFC 2198).
The valid value is 96 to 127. The default is 104.
Note: The parameter is applicable only if the
RTPRedundancyDepth parameter is set to 1.
'Packing Factor'
[RTPPackingFactor]
N/A (controlled internally by the device according to
the selected coder).
'RFC 2833 TX Payload Type'
configure voip > gateway
dtmf-supp-service dtmf-and-
dialing > telephony-events-
payload-type-tx
[RFC2833TxPayloadType]
Defines the Tx RFC 2833 DTMF relay dynamic
payload type for outbound calls.
The valid range is 96 to 127. The default is 96.
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